188.8.131.52. Definition of malfunctions of a regulator of pressure
If the storage battery on the car is constantly recharged, it is necessary, without removing a pressure regulator, to check up it under following conditions:
– The storage battery should be completely charged;
– All consumers, except the storage battery and ignition system, should be disconnected;
– Engine turns should be 2500–3000 mines-1.
Measure the voltmeter pressure on battery plugs. If pressure does not exceed 14,5 In, the regulator is serviceable. If it is more, connect the case of a regulator to a car body a separate conductor and again measure pressure.
If it again appears raised the regulator is faulty also it it is necessary to adjust or replace. If pressure is normal, the reason of the raised pressure and a recharge of the storage battery in bad connection of the case of a regulator with weight.
Malfunction of a regulator of pressure can be defined at check of its internal parts.
Causes of defect
|Breakage in the thermocompensating resistor 1 (fig. the Regulator of pressure РР-380 see) or in a regulator winding; thus pressure is not regulated and excessively raises ||Check up resistance of a winding and thermocompensating resistor. This malfunction can be revealed at check by an ohmmeter of electric resistance between the tip «15» regulators and weight |
|Breakage in a winding of a throttle or in additional resistors 2; thus regulation unstable (sharp fluctuations of pressure) ||Malfunction comes to light at check of electric resistance between tips «15» and «67» at the opened contacts both 1st, and 2nd step of a regulator |
|Pollution, подгорание or oxidation of contacts of 1st and 2nd step, when adjustable pressure unstable ||Malfunction can be caused penetration in a regulator of extraneous substances, or damage of a wire to a chain between tips of "67" regulator and the generator |
Penetration into a regulator of extraneous substances occurs because of wrong installation or damage of a sealing lining between a cover and the regulator basis and also if the lining is made of an inappropriate material and does not provide reliable tightness or allocates flying substances.
At damage of contacts it is recommended to check up a condition of chains (short circuits and correctness of connection of wires), and also serviceability of the generator.